Theory questions
What is the difference between linear motion and rotational motion?
Linear motion occurs in a straight line, while rotational motion involves turning around an axis.
What is combined motion and when does it occur?
It is the combination of linear and rotational motion, such as a rolling wheel.
what is the kinetic energy of a 774 kg car that travels at 68 m/s?
R= 1,789,488 J
A person has a mass of 7.5 kg, the person is lifted from the floor and placed on a chair, if he gains 147 J of PE, How high is the chair?
R= 2 meters
What does kinematics study?
The Motion of bodies or objects
What is pure rotational motion?
Rotation without moving from place.
What is the formula to get the Frequency?
R= F= T/1
what is the kinetic energy of a 25 kg kid that travels at 2 m/s?
R= 50 J
A rock with a radius of 2 m rotates at a frequency of 7 revolutions per second, what is his linear speed?
R= 87.9648 m/s
A wheel start's from rest and speeds up at constant acceleration of 75 rad/s² for 0.5 s, what was it's final angular velocity (before it started)
R= 150 m/s²
How are period and frequency related?
They are inverses.
What factors does kinetic energy depend on?
It depends on the mass and velocity of the object.
A car moves in a circle with a radius of 10 m and has a period of 0.60 seconds, what is the linear speed?
R= 104.72 m/s
A monkey climbs on a wall that is 4.7 m of high, and gains 784 J, what is his mass?
R= 17.02 Kg
A wheel rotates through 72 rad in 3.7 s, while slowing down at rate of 45 rad/s, what was it's initial angular velocity (before starting to slow down)
R= -7.2 m/s²
What characteristics define uniform circular motion?
It has constant speed and a circular path, although the direction is continuously changing.
How does height influence gravitational potential energy?
The greater the height, the greater the potential energy.
A ball rotates in a horizontal line that has a period of 75.3 s, calculates its frequency of rotation
R= 75.3 seconds
A tennis ball rotates in a horizontal line that has a period of 0.12 s, calculates its frequency
R= 0.12 seconds
Name one of the two formulas for Linear motion
V=(2πR)/T V=2 π R F